Web28 Feb 2024 · Potentiometer. A potentiometer is a three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider. It is used for the measurement … A potentiometer is a three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider. If only two terminals are used, one end and the wiper, it acts as a variable resistor or rheostat. It works by sliding a conductor in a graphite disk that has a stable resistance depending on the position the conductor has on the disk.
Potentiometer - Wikipedia
A potentiometer is an instrument for measuring voltage or 'potential difference' by comparison of an unknown voltage with a known reference voltage. If a sensitive indicating instrument is used, very little current is drawn from the source of the unknown voltage. Since the reference voltage can be produced … See more The principle of a potentiometer is that the potential dropped across a segment of a wire of uniform cross-section carrying a constant current is directly proportional to its length. The potentiometer is a simple device used to … See more This is a form of the constant resistance potentiometer described above but designed to minimize the effects of contact resistance and thermal emf. This equipment is satisfactorily used down to readings of 1000 nV or so. See more To make a potentiometric determination of an analyte in a solution, the potential of the cell is measured. This measurement must be corrected for the reference and junction potentials. It can also be used in standardisation methods. The concentration of the … See more In this circuit, the ends of a uniform resistance wire R1 are connected to a regulated DC supply VS for use as a voltage divider. The … See more The constant resistance potentiometer is a variation of the basic idea in which a variable current is fed through a fixed resistor. These are used primarily for measurements in … See more Another development of the standard types was the 'thermocouple potentiometer' especially adapted for temperature … See more A metre bridge is a simple type of potentiometer which may be used in school science laboratories to demonstrate the principle of resistance measurement by … See more margarita international resort village
Potentiometers MCQ [Free PDF] - Objective Question Answer for ...
Web19 Mar 2024 · Technically, a variable resistor is known as a rheostat, but potentiometers can be made to function as rheostats quite easily. In its simplest configuration, a potentiometer may be used as a rheostat by simply using the wiper terminal and one of the other terminals, the third terminal left unconnected and unused: Moving the potentiometer ... WebQ. Assertion :A potentiometer is preferred over a voltmeter for the measurement of emf of a cell. Reason: A potentiometer is preferred, as it does not drawn any current from the cell. Q. For measuring voltage of any circuit, potentiometer is preferred to voltmeter because. Q. Would you prefer a voltmeter or a potentiometer to measure the emf of ... Web24 Jan 2024 · The potentiometer is an electric instrument that is used to measure the EMF (electromotive force) of a given cell and also the cell’s internal resistance. Furthermore, it … margarita ingredienti